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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdint.h>
#include "common/bidi_queue.h"
#include "common/multi_priority_queue.h"
#include "hci/acl_manager.h"
#include "hci/controller.h"
#include "hci/hci_packets.h"
#include "os/handler.h"
namespace bluetooth {
namespace hci {
namespace acl_manager {
class RoundRobinScheduler {
public:
RoundRobinScheduler(
os::Handler* handler, Controller* controller, common::BidiQueueEnd<AclBuilder, AclView>* hci_queue_end);
~RoundRobinScheduler();
enum ConnectionType { CLASSIC, LE };
struct acl_queue_handler {
ConnectionType connection_type_;
std::shared_ptr<acl_manager::AclConnection::Queue> queue_;
bool dequeue_is_registered_ = false;
uint16_t number_of_sent_packets_ = 0; // Track credits
bool high_priority_ = false; // For A2dp use
};
void Register(ConnectionType connection_type, uint16_t handle,
std::shared_ptr<acl_manager::AclConnection::Queue> queue);
void Unregister(uint16_t handle);
void SetLinkPriority(uint16_t handle, bool high_priority);
uint16_t GetCredits();
uint16_t GetLeCredits();
private:
void start_round_robin();
void buffer_packet(std::map<uint16_t, acl_queue_handler>::iterator acl_queue_handler);
void unregister_all_connections();
void send_next_fragment();
std::unique_ptr<AclBuilder> handle_enqueue_next_fragment();
void incoming_acl_credits(uint16_t handle, uint16_t credits);
os::Handler* handler_ = nullptr;
Controller* controller_ = nullptr;
std::map<uint16_t, acl_queue_handler> acl_queue_handlers_;
common::MultiPriorityQueue<std::pair<ConnectionType, std::unique_ptr<AclBuilder>>, 2> fragments_to_send_;
uint16_t max_acl_packet_credits_ = 0;
uint16_t acl_packet_credits_ = 0;
uint16_t le_max_acl_packet_credits_ = 0;
uint16_t le_acl_packet_credits_ = 0;
size_t hci_mtu_{0};
size_t le_hci_mtu_{0};
std::atomic_bool enqueue_registered_ = false;
common::BidiQueueEnd<AclBuilder, AclView>* hci_queue_end_ = nullptr;
// first register queue end for the Round-robin schedule
std::map<uint16_t, acl_queue_handler>::iterator starting_point_;
};
} // namespace acl_manager
} // namespace hci
} // namespace bluetooth
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